SD U.S. Senate 2026
U.S. Senate · SD · upcoming · 2026
Candidates
- Mike Rounds Republican Incumbent
- Brian Bengs Independent
- Julian C Beaudion Democrat
Campaign finance
Total receipts through 2026-05-13. Source: FEC (public domain).
- Mike Rounds $4.0M raised · $0 cash
- Brian Bengs $666K raised · $0 cash
- Julian C Beaudion $210K raised · $0 cash
Demographics
South Dakota · 2022 ACS 5-year. Source: Census ACS.
- Population
- 890,342
- Median income
- $69,457
Forecast
As of 2026-06-29T03:43:04.719070+00:00. Heuristic + Monte Carlo — methodology.
0%
Democratic win probability
R+28.5
predicted margin (range R+37.4 to R+19.5)
Current officeholders
Sitting members for this seat.